Earth-boring apparatus and method of making same



APPLICATION VHLED JULY 29,1921.

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EARTH BORING APPARATUS AND METHOD OF MAKING SAME.

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1 ,4:O8,886. Patented Mar. 7, 1922.

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UNETQELE) STATEfi FATE? ()FFlCE.

FREDERICK A. lNGrltLL OF BREE/TEN TOWNSHIP, COOK COUNTY, ILLINOIS, ASSIGNOR.

TO WYlVIAN-GORDON OOll IPANY, TION OF MASFEACHUSETTS.

011 TVORCESTT'R MASSACHUSETTS,

A CORPORA- EARTEPEOIR ING APPARATUS AND METHOD OF MAKING SAME.

Specification of Letters Patent.

lt 'aten'ted Mar. '7, 1922.

Application filed July 29, 1921. Serial No. 483,284.

To all whom it may concern:

Be it known that I, Fnnnnnrok A. TNGALLS, a citizen of the United States, residing in the township of Bremen, county of (look,

and State of Illinois, have invented certain new and useful Improvements in Eartlr Boring Apparatusand Methods of lVlaking Same, of which the following is a specification.

This invention relates to earth-boring apparatus and method of making the same, but more particularly to drill jars for use in sinking deep wells, and has for its primary object to economically produce a de vice of this class which will be durable and efiicient in service.

Further objects of the invention are to provide uniformity in the physical characteristics of the steel throughout; to eliminate distortion; to eliminate welding; to permit the use of a higher quality of steel than is possible where welding is necessary' to provide a jar construction which may be produced practically entirely by forging; and to provide a structure which may be quickly and easily assembled and when once assembled cannot become disassembled or work loose.

The many other objects and advantages of my invention will be better understood by reference to the following specification, when considered in connection with the ccompa-nying drawings illustrating a selected embodiment thereof, in which F ig. l is an elevation of the reins of the upper jar member at the completion ot the initial forging operation.

Fig. 2 is the same as Fig. 1, plan view.

Fig. 3 is an end view of one of the reins of the ar member shown in Fig. 1.

Fig. 4; is a plan view of the head, to which the reins, shown in Fig. l, are to be attached.

Figs. 5, 6 and 7 are sections on the lines 5--5, 6-6 and 7-7 respectively, of Fig. 4.

Fig. 8 is an elevation-0t the lower jar member which links with the upper member shown in the previous figures.

Fig. 9 is an elevation of the lower jar member and the reins of the upper member, illustrating the mode of assembly.

Fig. 10 is an elevation, partially in sec tion of the assembled and completed jar.

Figs. 11 and 12 are sections on the lines Ill-11 and 12-12 respectively, of Fig. 10.

Referring to the drawings, the jar consists of two members, 15 and 16, which will be hereinafter referred to as the upper and lower Jar members respectively, though it w ll be readily appreciated that the relative positions of these members may be reversed. These members are substantially identical in form when completed and assembled with the exception that the upper member is usually provided with a tang 17 for attachment to the operating rod whereas the lower member has a socket 18 to receive the boring tool. These members interlink in substam tially the same manner as the links of a chain.

The upper jar member 15 is formed in two parts, the reins l9 and the head 20. Thereins 19 are joined at their outer end portion by a web 21.. The inner end portions of the reins are provided with oppositely disposed inwardly projecting lugs 22 which are adapted to be forced into opposite ends of socket 23 extending transversely through the outer end portion or shank of the head 20. These lugs are preferably formed slightly flaring and, the socket initially of su cient size to admit the enlarged outer ends. The compression of the head in the assembling'operation causes the socket to be contracted totightly fit these flaring lugs and, to form an absolutely rigid union between the reins and the head. The grip of the socket upon the lugs is further increased by the shrinkage of the heated head in cooling, the lugs being cold at the time of assembly.

The inner faces of the reins 19 are pret erably cut away about the lugs 22 in order to form a seat 21- for the shank 25 of the head 20 as it is advisable to form this shank of greater thickness than the width of the slot 26 to provide adequate strength and stability. The end or striking face 28 of the shank 25 is preferably concaved to fit the rounded end 29 of the lower member 16. This concavity of the striking face tends to torce the metal of the tip inwardly and thus prevents the burring of the tip during the boring operation.

The lower member 16 is preferably formed in one part with the reins integral with the head. The corresponding slots 26 and 32 in the upper and the lower jar members respectively, should preferably be of equal length as should the reins of these members so that when the two members are] pressed together in service, the tips 33 and 29 will simultaneously contact with the opposing striking faces 34 and 28 respectively. The pressure exerted by the upper member upon the lower tween the two tips.

The jar is preferably formed practically entirely by forging and no welding is necessary. I This elimination of weldi'ngis a particularly important feature as it permits the use of a higher grade of steel than would be possible it welding was required. Furthermore, the welded joints have always been the weak points of the j ar. The use of a higher grade of steel enables the length of stroke or. relative movement of the ar members to be safely increased and thus increases the force of the jolt. This accomplishes a "very material saving o't time in the drilling operation.

In the forging operation the reins are initially. formed from a blank by means of forming dies and trimmed between trim-- ming dies into the form shown in Fig. l.

The reins are preferably partially spread in the manner shown in order tofacilitate the operation of the trmiming dies in re moving the flash, The reins are then still further spread into the form indicated in Fig. 9 .to' facilitate theinterlinking of the lower jar member therewith. Each of the reins should preferably be heated at the head are spread bending point 38. The lower j armember 16 is forged complete between forming dies and then trimmed between trimming dies into the form shown in Fig. 8. In order to permit the interlinking of the two members in the manner shown in Fig. 9, the portions 39 of the reins between the web and the i into substantially the form indicated byjthe dotted lines in Fi g. 8.

As soon as the lower jaw member is brought into alignment with the center line of the reins of the upper member, these reins are ready for assembly with the head 20.

This assembly is accomplishedby placing.

the shank of the head between the spread ends of the reins 19 with the lugs 22 dieposed opposite their corresponding ends of the socket 23. The head at this time is preferably in a heated condition, whereas the reins are cold except at the bending points 38. The reins 19 are now struck between dies to force their ends inwardly and the lugs 22 into socket 23. Thesedies compress the head and cause the socketto be contracted to closely fit the flaring lugs. The subsequent shrinkage of the heated head in cooling causes an extremely tight binding presure to be exerted by the walls ct the socket upon the unheated lugs so member is thus divided bedeep is rendered impossible. The union thus formed between the reins 19 and the head 20 is substantially as strong "as though the upper jar member hadbeen initially iorme-Ll. in one part like the lower jar member and the jar at the joint is stronger than any of the reins. The assembled jar is then turned a right angle and struck between dies to straighten the warped portions 39 of the reins of the lower member.

The jar members are maintained in alignment during the drilling operation by the guides d0 and ll on the upper and lower jar members respectively. The threading performed bit the tang 17 and the socket is after the completion of i the forging and assembling operations.

it will thus be readily evident that a strong and durable jar has been provided. This is particularly important in drilling wells for the breakage of a jar will often seriously delay the drilling opera tion and may necessitate the abandonment of the well. Heretoitore it has been generally accepted that a jar could not be used more than a thousand feet, but with thepresent jar any practical depth may be reached with a single jar. In addition to the loss of time and labor resulting from a broken or worn out jar, these jars are expensive and the cost of the operation is rery materially increased if it is necessary to provide a number of new jars to drill a single well.

I .am aware that many changes may be made in the form and method of production of my improved jar, without departing-from the spirit of my invention, and I reserve the right to make all such as iairly fall within the scope of the following claims.

I claim as my invention: p

1. A jar link comprising spaced reins connected at substantially :their outerendsand having inwardly projecting lugsnear their inner ends, anda head provided with sockets to receive and engagethe corresponding lugs on said'reinsto form a connection between said reins and said head. v

2. A. jar link comprising substantially parallel spaced reins connected at their outer ends by a web and having oppositely disposed inwardly projecting lugs near their inner ends, and a head provided with sockets to receive and engage said lugs to form a connection between said reins. and said head.

3. A jar link comprising spaced reins connected at substantially their outer ends and having inwardly projecting flaring lugs near their inner ends, and ahead provided with a socket to receive'andengage said lugs to form a connection between said reins and said head.

.4. A jarlink comprising spaced reins connected at substantially their outer ends and having inwardly projecting lugs near their inner ends, and a head having a shank disposed between the inner ends of said reins and sockets formed in the opposite sides of said shank to receive the corresponding lugs on said reins.

5. A jar link comprising spaced reins connected at one end and having recesses formed in their inner faces at their opposite ends, lugs projecting inwardly from the recessed portions oi said reins, and a head provided with a shank fitting in the socket formed by the recesses in said reins and having sockets in its opposite faces to receive and engage the corresponding lugs on said reins to form a connection between said head and said reins. V

6. A jar link comprising a head, reins connected at their outer ends and separated at their inner ends, and means for attaching the inner ends of said reins to said head.

7. A jar link comprising a head, reins connected at their outer ends and separate at their inner ends, and means for providing an interlocking connection between the inner ends of said reins and said head.

8. A jar link comprising a head, reins connected at their outer ends and separate at their inner ends, and lugs on the inner end portion of each of said reins fitting within corresponding sockets in said head to form an interlocking connection between said reins and said head.

9. A jar link comprising two sections having interlocked parts forged into engagement.

10. The method of making jar links consisting in forming the link in two sections having interlocking parts and forging these parts into engagement.

11. The method of making jar links consisting in forming the reins with laterally projecting lugs, forming the head with sockets to receive the corresponding lugs on the reins, and forcing the lugs on the reins into the sockets in the head to form an interlocking joint between the head and the reins.

12. The method of making jar links consisting in forming the reins with laterally projecting lugs, forming the head with sockets to receive the corresponding lugs on the reins, forcing the lugs on the reins into the sockets in the head, and compressing the head to retain the lugs within the sockets.

13. The method of making jar links consisting in forming the reins with inwardly projecting lugs, forming the head with lateral sockets to receive the corresponding lugs on the reins, placing'the head in a heated condition between the unheated lugs, and forcing the lugs into the sockets in the head.

14. The method of making jar links consisting in forming the reins with inwardly projecting lugs, forming the head with lateral sockets to receive the corresponding lugs on the reins, placing the head in a heated condition between the unheated lugs, forcing the lugs into the sockets in the head, and compressing the head to contract the sockets about the 111 's.

FI%EDERICK A. INGALLS. 

